Defense Technology & Innovations — PYQs
1. Introduction — Defense Technology & Innovations
- Defense Technology and Innovations is a critical area with rapid advancements, frequently featuring in UPSC Prelims.
- This section covers key defense technology terms asked in previous year questions.
KNOWLEDGE NUGGET
- Defense Technology: Application of scientific and engineering principles for military and strategic purposes
- Key Areas: Missile systems, nuclear technology, cyber defense, surveillance, propulsion systems, modern warfare innovations
2. Defense Technology & Innovations — Previous Year Questions
2023 — BALLISTIC MISSILE
- Travel along a ballistic path for most of their journey, regardless of their purpose as weapon carriers.
- Initially propelled by rockets but subsequently enter an unpowered descent towards their destination.
- Examples: Prithvi I, Prithvi II, Agni I, Agni II, and Dhanush ballistic missiles.
2023 — CRUISE MISSILES
- Unmanned self-propelled guided missiles that sustain flight through aerodynamic lift for most of their flight path.
- Fly within the earth's atmosphere and use jet engine technology.
- Examples: BrahMos, Harpoon (USA), Exocet (France).
2022 — FRACTIONAL ORBITAL BOMBARDMENT SYSTEM (FOBS)
- A nuclear weapon delivery system designed to achieve orbit partially around the Earth before re-entering the atmosphere to hit its target.
- This path makes detection and defense difficult, enhancing the element of surprise in a nuclear strike.
2022 — HYPERSONIC MISSILE
- Capable of flying at least at the speed of Mach 5, i.e., five times the speed of sound.
- Unlike ballistic missiles, which follow a set course, hypersonic missiles are maneuverable, which makes them extremely lethal.
3. Important Terms in News
AIR INDEPENDENT PROPULSION (AIP) TECHNOLOGY
- Marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (either by surfacing or using a snorkel).
- Conventional diesel-electric submarines must surface every 48 hours to recharge their batteries, making them vulnerable to detection.
- AIP systems can extend underwater operations to two weeks.
CERAMIC RADOME TECHNOLOGY
- A protective shield for radar gear and antennas, safeguarding them from environmental elements like rain, snow, UV radiation, and high winds.
- Ceramics are inorganic and non-metallic materials which are corrosion-resistant, hard, and brittle.
- They are excellent insulators and can withstand high temperatures.
CLUSTER MUNITION
- Non-precision weapons designed to injure or kill human beings indiscriminately over a large area, and to infrastructure in the vicinity.
- Have a high dud rate — thousands of smaller unexploded bomblets can remain and kill/maim people decades later.
- Convention on Cluster Munitions (enforced in 2010) prohibits ratifying countries (110) from production, transfer, and stockpiling of cluster munitions.
NUCLEAR ENRICHMENT
- Approximately 99.3% of naturally occurring uranium is of the isotope U-238, which is not fissionable.
- Uranium ore is enriched to increase the concentration of U-235.
- Nuclear power plants require an enrichment of 3-4% U-235 to sustain a chain reaction.
- Fission bombs need closer to 90% enrichment.
3D-PRINTED BOMBS (Candy Bombs)
- Ukraine is using 3D-printed bombs to overcome ammunition shortages and maintain counteroffensive.
- Also known as "Candy Bombs", they are made by producing 3D-printed casings and filling them with C4 explosives and shrapnel.
- They are cost-effective and adaptable in size for optimal drone payload use.
GAJRAJ SYSTEM
- A kind of Intrusion Detection System (IDS).
- Built to use the existing optical fiber cable (OFC) as sensors to identify elephant movements near railway tracks and alert locations to station masters, loco pilots, and control offices.
- The Indian Railways has chosen the Northeast Frontier Railways to pilot this program.
IRON STING
- A laser and GPS-guided system built to engage targets in around 1 to 12 km range with around 90% accuracy and ensures minimal collateral damage.
- Fulfills the needs of adapting combat capabilities to contend with enemies hidden within civilian and urban environments.
QUASI-BALLISTIC MISSILE
- Combines features of both ballistic and cruise missiles.
- Follows a high-altitude ballistic trajectory but can also maneuver in flight, making it more difficult to intercept than a traditional ballistic missile.
SAGAR SAMPARK — DGNSS
- An indigenous Differential Global Navigation Satellite System (DGNSS).
- A terrestrial-based enhancement system that corrects errors and inaccuracies in the Global Navigation Satellite System (GNSS) and provides more accurate positioning information.
SWARM DRONES
- SWARM stands for "Smart War-Fighting Array of Reconfigured Modules".
- These systems consist of multiple drones working together in a coordinated manner to achieve various objectives.
THERMOBARIC BOMB (Vacuum Bomb / Aerosol Bomb)
- Also known as a vacuum bomb, aerosol bomb, or fuel-air explosive.
- Uses oxygen from the air for a large, high-temperature blast.
- A two-stage weapon, which can be launched from tanks or aircraft.
- More destructive than a conventional bomb.
- Consists of a fuel container with two separate explosive charges.
WHITE PHOSPHOROUS BOMBS
- A pyrophoric material, which ignites spontaneously when in contact with air.
- Dispersed in artillery shells, bombs, rockets, mortars, etc., to create a smokescreen and hide troop movement on the ground.
- White Phosphorus also interferes with infrared optics and weapons tracking systems.
- Causes serious injury and death when it comes into contact with the skin or is inhaled or swallowed.
4. Summary: Defense Technology at a Glance
| Year | Term | Key Description |
|---|---|---|
| 2023 | Ballistic Missile | Ballistic path; rocket-propelled then unpowered descent; Prithvi, Agni, Dhanush |
| 2023 | Cruise Missile | Aerodynamic lift; jet engine; BrahMos, Harpoon, Exocet |
| 2022 | FOBS | Fractional Orbital Bombardment System; difficult detection and defense |
| 2022 | Hypersonic Missile | Mach 5+; maneuverable; extremely lethal |
Key Takeaways for UPSC
- Ballistic Missile: Ballistic path, rocket-propelled, unpowered descent — Prithvi, Agni
- Cruise Missile: Aerodynamic lift, jet engine — BrahMos, Harpoon, Exocet
- Hypersonic Missile: Mach 5+, maneuverable
- FOBS: Partial orbit before re-entry — difficult to detect
- AIP Technology: Submarine underwater operation up to 2 weeks without surfacing
- Cluster Munition: High dud rate; Convention on Cluster Munitions (2010)
- Nuclear Enrichment: 3-4% U-235 for power plants; 90% for fission bombs
- Thermobaric Bomb: Fuel-air explosive; uses oxygen from air; two-stage weapon
- White Phosphorous: Pyrophoric; creates smokescreen; interferes with infrared optics
- SWARM Drones: Smart War-Fighting Array of Reconfigured Modules
- Sagar Sampark: Indigenous DGNSS for accurate positioning
- Iron Sting: Laser and GPS-guided system — 90% accuracy, minimal collateral damage
High-Yield Interactive UPSC Quiz (Defense Technology)
Q1. Which of the following is an example of a ballistic missile?
Correct Answer: B. Agni II is a ballistic missile. BrahMos, Harpoon, and Exocet are cruise missiles. Ballistic missiles follow a ballistic path and are rocket-propelled.
Q2. Cruise missiles use which technology for propulsion?
Correct Answer: B. Cruise missiles use jet engine technology and sustain flight through aerodynamic lift for most of their flight path.
Q3. Hypersonic missiles are capable of flying at speeds of at least:
Correct Answer: D. Hypersonic missiles are capable of flying at least at the speed of Mach 5, i.e., five times the speed of sound.
Q4. Air Independent Propulsion (AIP) technology can extend submarine underwater operations to:
Correct Answer: C. AIP systems can extend underwater operations to two weeks, compared to conventional submarines that must surface every 48 hours.
Q5. The Convention on Cluster Munitions prohibits ratifying countries from:
Correct Answer: B. The Convention on Cluster Munitions (enforced in 2010) prohibits ratifying countries from production, transfer, and stockpiling of cluster munitions.
Q6. Nuclear power plants require uranium enriched to what percentage of U-235?
Correct Answer: B. Nuclear power plants require an enrichment of 3-4% U-235 to sustain a chain reaction. Fission bombs need closer to 90% enrichment.
Q7. Quasi-ballistic missiles combine features of:
Correct Answer: B. A quasi-ballistic missile combines features of both ballistic and cruise missiles. It follows a high-altitude ballistic trajectory but can also maneuver in flight.
Q8. Thermobaric bombs are also known as:
Correct Answer: C. Thermobaric bombs are also known as vacuum bombs, aerosol bombs, or fuel-air explosives. They use oxygen from the air for a large, high-temperature blast.
Q9. White Phosphorus is used primarily to:
Correct Answer: D. White Phosphorus is a pyrophoric material used to create a smokescreen, interfere with infrared optics and weapons tracking systems, and can also cause serious injury.
Q10. SWARM in Swarm Drones stands for:
Correct Answer: B. SWARM stands for "Smart War-Fighting Array of Reconfigured Modules." These systems consist of multiple drones working together in a coordinated manner.